Go through the Math in Focus Grade 1 Workbook Answer Key Chapter 18 Multiplication and Division to finish your assignments.

## Math in Focus Grade 1 Chapter 18 Answer Key Multiplication and Division

**Put On Your Thinking Cap!**

**Challenging Practice**

Lena collects erasers. Look at the picture. Then fill in the blanks.

Question 1.

Lena has __________ erasers.

Answer:

20 erasers

Explanation:

Lena has 20 erasers.

Count the number of groups.

Then arrange the erasers in each group equally

5 fours = 20

Question 2.

She puts the erasers equally into 5 boxes. How many erasers are in each box? __________

Answer:

4 erasers are in each box.

Explanation:

Lena has 20 erasers.

She want to put the erasers in 5 boxes

20 ÷ 5 = 4

Question 3.

She puts the erasers equally into 4 boxes. How many erasers are in each box? __________

Answer:

5 erasers are in each box.

Explanation:

Lena has 20 erasers,

she want to put in 4 boxes.

4 fives = 20

4 x 5 = 20

Question 4.

She puts 10 erasers into each box. How many boxes does she need? __________

Answer:

2 boxes does she need

Explanation:

Lena has 20 erasers,

She puts 10 erasers into each box.

10 x 2 = 20

So, she need 2 boxes.

Question 5.

She puts 4 erasers into each box. How many boxes does she need? __________

Answer:

5 boxes she needed.

Explanation:

Lena has 20 erasers.

She puts 4 erasers into each box.

5 fours = 20

5 x 4 = 20

**Put On Your Thinking Cap!**

**Problem Solving**

**Solve.**

There are 8 squares and 12 triangles. Put an equal number of each shape into each group.

Question 1.

Put them into 2 groups.

There are __________ ☐ in each group.

There are __________ △ in each group.

There are __________ shapes in each group.

Answer:

There are 4 ☐ in each group.

There are 6 △ in each group.

There are (△ and ☐) 2 shapes in each group.

Explanation:

Count the number of triangles and squares.

Then put them into 2 groups equally.

Triangles = 8 ÷ 2 = 4

Squares = 8 ÷ 2 = 4

So, There are (△ and ☐) 2 shapes in each group.

Question 2.

Put them into 4 groups.

There are __________ ☐ in each group.

There are __________ △ in each group.

There are __________ shapes in each group.

Answer:

There are 2 ☐ in each group.

There are 3 △ in each group.

There are (△ and ☐) 2 shapes in each group.

Explanation:

Count the number of triangles and squares.

Then put them into 4 groups equally.

Triangles = 8 ÷ 4 = 2

Squares = 8 ÷ 4 = 2

So, There are (△ and ☐) 2 shapes in each group.

**Chapter Review/Test**

**Vocabulary**

**Choose the correct word.**

same

groups

Question 1.

The picture shows equal ____________

Answer: groups

The picture shows equal groups

Explanation:

The above picture shows the groups,

because total number of stars are equally divided into 3 groups.

So, stars are arranged in groups.

Question 2.

By adding the ____________ number, you will have 9 ★ in all.

Answer:

By adding the same number, you will have 9 ★ in all.

Explanation:

The above picture shows the groups of tar,

which are equally divided into 3 groups.

Then add the same number of stars to the other to get the sum.

**Concepts and Skills**

**Fill in the blanks.**

Question 3.

2 + 2 + 2 = ____________

3 twos = ____________

Answer:

2 + 2 + 2 = 6

3 twos = 6

Explanation:

The sum is 6,

6 is equally divided into 3 groups,

each group has 2 numbers.

Question 4.

5 + 5 + 5 + 5 = ____________

4 fives = ____________

Answer:

5 + 5 + 5 + 5 = 20

4 fives =20

Explanation:

The sum is 20,

20 is equally divided into 3 groups,

each group has 5 numbers.

**Match.**

Question 5.

Answer:

Explanation:

5 threes is written as 3+3+3+3+3

3 is arranged in 5 groups.

4+4+4+4 is written as 16

16 is divided in 4 groups.

7+7+7 is written as 7 threes,

7 is arranged in 3 groups.

3+3+3+3+3+3+3 is written as 3 sevens,

3 is arranged in 7 groups.

7 twos is written as 7+7,

7 is arranged in 2 groups.

Question 6.

A farmer has 16 chickens. He puts 8 chickens in a coop. How many coops does he need?

He needs ____________ coops.

Answer:

2 coops

Explanation:

A farmer has 16 chickens.

He puts 8 chickens in a coop.

Total coops does he need

2 coops does he need

2 eights = 16

2 x 8 = 16

Question 7.

There are 20 seeds. Put an equal number of seeds in each pot.

There are ____________ seeds in each pot.

Answer:

10 seeds in each pot

Explanation:

There are 20 seeds.

Put an equal number of seeds in each pot.

10 x 2 = 20

2 tens = 20